Apple is once again leading the development in their way, and I think they are doing the right thing here. Files and folders have been with us for a very long time, and we are as always afraid of getting rid of what we are used to.
But the future is in the cloud, and we don’t really need that kind of hierachy there.

Dropbox is a modern way of managing old standards, and that’s a great thing that makes the step to cloud computing smaller.